Hairbrush



FIG. 1 is a perspective view of a hairbrush, showing my new design;

FIG. 2 is a front elevational view of the hairbrush shown in FIG. 1;

FIG. 3 is a rear elevational view of the hairbrush shown in FIG. 1;

FIG. 4 is a left-side elevational view of the hairbrush shown in FIG. 1;

FIG. 5 is a right-side elevational view of the hairbrush shown in FIG. 1;

FIG. 6 is a top plan view of the hairbrush shown in FIG. 1; and,

FIG. 7 is a bottom plan view of the hairbrush shown in FIG. 1.

The broken lines showing a user's hand and spray in FIG. 1 form no part of the claimed design. 

The ornamental design for a hairbrush, as shown and described. 